                    &        (17)        &        (18)        &        (19)        &        (20)        &        (21)        \\
                    &        b/se        &        b/se        &        b/se        &        b/se        &        b/se        \\
Immigration Policy (t-1)&       0.895$^{***}$&       0.900$^{***}$&       0.887$^{***}$&       0.891$^{***}$&       0.862$^{***}$\\
                    &     (0.008)        &     (0.009)        &     (0.014)        &     (0.014)        &     (0.016)        \\
Ln(Oil Income per Capita) (t-1)&      -0.010$^{*}$  &      -0.013$^{*}$  &      -0.023$^{***}$&      -0.015$^{*}$  &      -0.034$^{***}$\\
                    &     (0.005)        &     (0.005)        &     (0.006)        &     (0.006)        &     (0.007)        \\
Tariff Rate (t-1)   &       0.005$^{***}$&       0.007$^{**}$ &       0.005$^{+}$  &       0.005$^{*}$  &       0.002        \\
                    &     (0.001)        &     (0.002)        &     (0.003)        &     (0.002)        &     (0.005)        \\
Ln(Oil Income per Capita) (t-1) $\times$ Tariff Rate (t-1)&      -0.000        &      -0.000        &       0.002$^{*}$  &       0.001$^{+}$  &       0.002$^{*}$  \\
                    &     (0.001)        &     (0.001)        &     (0.001)        &     (0.001)        &     (0.001)        \\
Ln(GDP per Capita) (t-1)&      -0.003        &       0.025        &      -0.046        &       0.010        &      -0.061        \\
                    &     (0.040)        &     (0.086)        &     (0.046)        &     (0.048)        &     (0.080)        \\
GDP Growth (t-1)    &       0.043        &       0.025        &      -0.203        &      -0.156        &      -0.146        \\
                    &     (0.127)        &     (0.200)        &     (0.169)        &     (0.156)        &     (0.205)        \\
Ln(Population) (t-1)&       0.205        &       0.013        &      -0.201        &      -0.146        &      -0.875$^{**}$ \\
                    &     (0.177)        &     (0.231)        &     (0.235)        &     (0.230)        &     (0.285)        \\
Polity Score (t-1)  &      -0.001        &      -0.004        &      -0.009        &      -0.008        &      -0.043$^{*}$  \\
                    &     (0.005)        &     (0.004)        &     (0.008)        &     (0.008)        &     (0.018)        \\
Real Effective Exchange Rate (t-1)&                    &       0.000        &                    &                    &      -0.000        \\
                    &                    &     (0.000)        &                    &                    &     (0.000)        \\
Welfare Taxation (\%GDP) (t-1)&                    &                    &      -0.003        &                    &      -0.002        \\
                    &                    &                    &     (0.003)        &                    &     (0.004)        \\
Personal Income Taxation (\%GDP) (t-1)&                    &                    &      -0.012$^{***}$&                    &      -0.012$^{***}$\\
                    &                    &                    &     (0.003)        &                    &     (0.003)        \\
Right-wing Populist Vote Share (t-1)&                    &                    &                    &      -0.003$^{**}$ &      -0.002$^{+}$  \\
                    &                    &                    &                    &     (0.001)        &     (0.001)        \\
Observations        &        1198        &         995        &         921        &         939        &         805        \\
Countries           &          24        &          23        &          17        &          17        &          17        \\
R$^2$               &       0.990        &       0.991        &       0.991        &       0.990        &       0.992        \\
